<!DOCTYPE html>
<html>
<head>
    <title></title>
    <link href="styles.css" rel="stylesheet"/>
</head>
<body>

<div id="main-wrapper">
    <div id="content-wrapper">
        <div id="header">
            This is header!
        </div>
        <div id="content">
            <div id="left-column">
                Left side bar
            </div>
            <div id="right-column">
                Right sidebar
            </div>
            <div id="center-column">
                Center column for content
            </div>
        </div>
    </div>

    <div id="footer">
        This is footer
    </div>
</div>

</body>
</html>